Vertical flat transformer

Abstract

The utility model relates to the technical field of transformers, in particular to a vertical flat transformer which comprises a base, a magnetic core, a primary side coil and a secondary side coil. The magnetic core, the primary side coil and the secondary side coil are arranged on the top surface of the base; the primary side coil and the secondary side coil are both wound on the magnetic core; insulating layers are arranged on the surface of the primary side coil and the surface of the secondary side coil; the primary side coil is composed of at least one stranded wire; the secondary side coil is composed of at least two flat wires; the base is provided with a first via hole for the primary side coil to pass through and a second via hole for the secondary side coil to pass through; a first tin penetrating groove and a second tin penetrating groove are formed in the bottom surface of the base; the first through hole is formed in the first tin penetration groove; the second through hole is formed in the second tin penetration groove; and the base is provided with at least one encapsulation hole. The motor is small in size, large in power and convenient to assemble.

Description

Technical Field

[0001] The utility model relates to the technical field of transformers, and particularly relates to a vertical flat transformer. Background Art

[0002] At present, vehicle-mounted high-power transformers usually use EE series ferrite or silicon steel sheets as magnetic core materials, and this design relies on the coil structure lined with a skeleton. In the traditional installation method of flat transformers (for example, a magnetic integrated transformer disclosed in Chinese Patent CN201620892025.1), the transformer, epoxy bottom plate, epoxy cushion plate and wire package are all independent components, which are processed separately and then assembled. The transformer with this structure has the following problems: 1. Processing and assembly complexity: This requires separately processing the epoxy bottom plate and cushion plate, and then precisely aligning and fixing them with the transformer and wire package, increasing the time and cost in the manufacturing process. 2. Large space occupation: Since each component is separated, the overall occupied space is relatively large; 3. High difficulty in miniaturization and light weight: In order to meet the requirements of modern vehicles for light weight and miniaturization, the traditional transformer design is difficult to increase the power output without increasing the volume, which poses a challenge to the miniaturization and light weight of the transformer.

[0003] Therefore, there is an urgent need for a vertical flat transformer with a small volume, high power and convenient assembly. Summary of the Invention

[0004] The purpose of the utility model is to overcome the above-mentioned disadvantages and provide a vertical flat transformer with a small volume, high power and convenient assembly.

[0005] To achieve the above purpose, the specific scheme of the utility model is as follows: A vertical flat transformer includes a base, a magnetic core, a primary coil and a secondary coil; the magnetic core, the primary coil and the secondary coil are all arranged on the top surface of the base; the primary coil and the secondary coil are both wound around the magnetic core; insulating layers are provided on the surfaces of the primary coil and the secondary coil; the primary coil is composed of at least one stranded wire; the secondary coil is composed of at least two flat wires; the base is provided with a first through hole for the primary coil to pass through and a second through hole for the secondary coil to pass through; a first tinning groove and a second tinning groove are provided on the bottom surface of the base; the first through hole is arranged in the first tinning groove; the second through hole is arranged in the second tinning groove; the base is provided with at least one potting hole.

[0006] The utility model is further arranged such that the magnetic core is a ferrite magnetic core.

[0007] The utility model is further arranged such that chamfers are provided at the edges of the first through hole and / or the edges of the second through hole.

[0008] The present utility model is further configured such that a potting groove is provided on the top surface of the base; the potting groove communicates with the potting hole.

[0009] The present utility model is further configured such that a reinforcing boss is provided on the top surface of the base.

[0010] The present utility model is further configured such that a convex bar is provided on the top surface of the base; limiting convex points are provided on the convex bar.

[0011] The present utility model is further configured such that a glue dispensing port is provided on the convex bar.

[0012] The beneficial effects of the present utility model are as follows: Due to the provision of the first tin-penetrating groove and the second tin-penetrating groove, the soldering is full and the heat dissipation is fast. Since the primary coil is composed of at least one stranded wire and the secondary coil is composed of at least two flat wires; therefore, its power is high. Also, a potting hole is provided, and the heat dissipation effect is good. The first tin-penetrating groove, the second tin-penetrating groove, and the potting port are all integrated on the base, with a small volume and convenient assembly. Description of the Drawings

[0013] The present utility model is further illustrated by the accompanying drawings, but the embodiments in the drawings do not constitute any limitation to the present utility model. For those of ordinary skill in the art, other drawings can also be obtained according to the following drawings without creative efforts.

[0014] Figure 1 It is a schematic diagram of the overall structure of the present utility model;

[0015] Figure 2 It is a schematic diagram of the structure of the present utility model from another angle;

[0016] Figure 3 It is an exploded view of the present utility model;

[0017] Figure 4 It is a schematic diagram of the structure of the top surface of the base of the present utility model;

[0018] Figure 5 It is a schematic diagram of the structure of the bottom surface of the base of the present utility model.

[0019] Wherein: 1. Base; 2. Magnetic core; 30. First via hole; 31. Second via hole; 4. Primary coil; 5. Secondary coil; 6. First tin-penetrating groove; 7. Second tin-penetrating groove; 8. Potting hole; 9. Potting groove; 10. Reinforcing boss; 11. Convex bar; 12. Limiting convex point; 3. Glue dispensing port. Detailed Embodiments

[0020] To facilitate the understanding of the present invention, the present invention will be described more comprehensively below with reference to the relevant drawings. Preferred embodiments of the present invention are shown in the drawings. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, these embodiments are provided to make the understanding of the disclosure of the present invention more thorough and comprehensive. It should be noted that when an element is referred to as being "fixed to" another element, it can be directly on the other element or there can also be an intermediate element. When an element is considered to be "connected" to another element, it can be directly connected to the other element or there may be an intermediate element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only.

[0021] As Figures 1-5 shown, a vertical flat transformer of this embodiment includes a base 1, a magnetic core 2, a primary coil 4 and a secondary coil 5; the magnetic core 2, the primary coil 4 and the secondary coil 5 are all arranged on the top surface of the base 1; the primary coil 4 and the secondary coil 5 are both wound around the magnetic core 2; insulating layers are provided on the surfaces of the primary coil 4 and the secondary coil 5; the primary coil 4 is composed of at least one stranded wire; the secondary coil 5 is composed of at least two flat wires; the base 1 is provided with a first through hole 30 for the primary coil 4 to pass through and a second through hole 31 for the secondary coil 5 to pass through; a first solder-through groove 6 and a second solder-through groove 7 are provided on the bottom surface of the base 1; the first through hole 30 is arranged in the first solder-through groove 6; the second through hole 31 is arranged in the second solder-through groove 7; the base 1 is provided with at least one potting hole 8.

[0022] Specifically, insulating layers are provided on the outer sides of the primary coil 4 and the secondary coil 5; there is no need to additionally provide an insulating skeleton, reducing the volume of the transformer; in addition, due to the provision of the potting hole 8, heat-dissipating silica gel can be poured into the potting hole 8 to achieve the effects of insulation, heat dissipation and waterproofing.

[0023] In the secondary coil 5, the leading pins of all the flat wires are connected in parallel, and the trailing pins of all the flat wires are also connected in parallel. This parallel connection method can be achieved by designing the wiring method of the external PCB board.

[0024] Since at least one strand of stranded wire is provided in the primary coil 4, it can be made of multi-strand stranded triple-insulated wire or can be made of multi-strand stranded enameled wire wrapped with polyimide tape.

[0025] Since the secondary side coil 5 is made of flat wire, the larger the root wire diameter, the greater the current passing through the wire, and the greater the power of the wire. Also, since at least two flat wires are provided, the surface area is larger than that of a single flat wire. Therefore, the heat dissipation effect of the coil wound by at least two flat wires is better.

[0026] During the wave soldering process, since the first solder penetration groove 6 and the second solder penetration groove 7 are provided, when the circuit board passes through the solder wave peak, the solder will penetrate into the first solder penetration groove 6 and the second solder penetration groove 7, and welding joints can also be formed between the pins in the first solder penetration groove 6 and the second solder penetration groove 7, avoiding poor soldering and product ejection, and making the welding more full.

[0027] The first solder penetration groove 6, the second solder penetration groove 7 and the potting seal are all integrated on the base 1, with small volume, large power and convenient assembly.

[0028] As Figures 1-5 shown, for a vertical flat transformer in this embodiment, the magnetic core 2 is a ferrite magnetic core 2.

[0029] Specifically, the material uses DMR96 magnetic core, which has low temperature rise, small loss and large power.

[0030] As Figure 2 、 4 shown, for a vertical flat transformer in this embodiment, chamfers are provided at the edges of the first via hole 30 and / or the edges of the second via hole 31.

[0031] When assembling the coil to the base 1, the chamfers are provided to facilitate the insertion of the pins of the primary side coil 4 and the secondary side coil 5.

[0032] As Figure 2 、 4 shown, for a vertical flat transformer in this embodiment, a potting groove 9 is provided on the top surface of the base 1; the potting groove 9 is communicated with the potting hole 8.

[0033] Specifically, when encapsulating the potting heat dissipation silica gel, the potting groove 9 can make the heat dissipation silica gel better adhere to the base 1, which is beneficial to improving the firmness of the assembly.

[0034] As Figure 2 、 4 shown, for a vertical flat transformer in this embodiment, a reinforcing boss 10 is provided on the top surface of the base 1.

[0035] Specifically, the first via hole 30 is provided on the reinforcing boss 10; when inserting the primary side coil 4 into the first via hole 30, the setting of the reinforcing boss 10 can increase the thickness of the base 1, significantly improve the rigidity of this area, and make the base 1 not easily deformed or broken.

[0036] As Figure 2 , 4 shown, a vertical flat transformer of this embodiment, a convex bar 11 is provided on the top surface of the base 1; a limiting convex point 12 is provided on the convex bar 11.

[0037] When assembling the magnetic core 2 onto the base 1, the setting of the limiting convex point 12 facilitates the assembly positioning.

[0038] As Figure 2 , 4 shown, a vertical flat transformer of this embodiment, a glue dispensing port 3 is provided on the convex bar 11. During the glue dispensing process, the setting of the glue dispensing port 3 facilitates the positioning.

[0039] The above is only a preferred embodiment of the present invention. Therefore, any equivalent changes or modifications made according to the structures, features, and principles described in the scope of the patent application of the present invention are included in the protection scope of the patent application of the present invention.

Claims

1. A vertical flat transformer, characterized in that: It includes a base (1), a magnetic core (2), a primary coil (4) and a secondary coil (5); The magnetic core (2), the primary coil (4) and the secondary coil (5) are all arranged on the top surface of the base (1); The primary coil (4) and the secondary coil (5) are both wound around the magnetic core (2); Insulation layers are provided on the surfaces of the primary coil (4) and the secondary coil (5); The primary coil (4) is composed of at least one stranded wire; The secondary coil (5) is composed of at least two flat wires; The base (1) is provided with a first through hole (30) for the primary coil (4) to pass through and a second through hole (31) for the secondary coil (5) to pass through; The bottom surface of the base (1) is provided with a first tin-penetrating groove (6) and a second tin-penetrating groove (7); The first through hole (30) is arranged in the first tin-penetrating groove (6); The second through hole (31) is arranged in the second tin-penetrating groove (7); The base (1) is provided with at least one potting hole (8).

2. The vertical flat transformer according to claim 1, wherein: The magnetic core (2) is a ferrite magnetic core (2).

3. The vertical flat transformer according to claim 1, wherein: Chamfers are provided at the edge of the first through hole (30) and / or the edge of the second through hole (31).

4. A vertical flat transformer according to claim 1, wherein: A potting groove (9) is provided on the top surface of the base (1); The potting groove (9) communicates with the potting hole (8).

5. The vertical flat transformer according to claim 1, wherein: A reinforcing boss (10) is provided on the top surface of the base (1).

6. The vertical flat transformer according to claim 1, characterized in that: A convex bar (11) is provided on the top surface of the base (1); Limit convex points (12) are provided on the convex bar (11).

7. The vertical flat transformer according to claim 6, characterized in that: A glue injection port (3) is provided on the convex bar (11).

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